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74HC164D-74HCT164N-74HCT164PW
74HC/HCT164; 8-bit serial-in/parallel-out shift register
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
FEATURES Gated serial data inputs Asynchronous master reset Output capability: standard ICC category: MSI
GENERAL DESCRIPTIONThe 74HC/HCT164 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT164 are 8-bit edge-triggered shift registers
with serial data entry and an output from each of the eight
stages.
Data is entered serially through one of two inputs (Dsaor
Dsb); either input can be used as an active HIGH enable for
data entry through the other input.
Both inputs must be connected together or an unused
input must be tied HIGH.
Data shifts one place to the right on each LOW-to-HIGH
transition of the clock (CP) input and enters into Q0, which
is the logical AND of the two data inputs (Dsa,Dsb) that
existed one set-up time prior to the rising clock edge.
A LOW level on the master reset (MR) input overrides all
other inputs and clears the register asynchronously,
forcing all outputs LOW.
QUICK REFERENCE DATAGND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
Notes CPD is used to determine the dynamic power dissipation (PDin μW): = CPD× VCC2×fi +∑ (CL× VCC2×fo) where: = input frequency in MHz = output frequency in MHz (CL× VCC2×fo) = sum of outputs= output load capacitance in pF
VCC= supply voltage in V For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC− 1.5 V
ORDERING INFORMATIONSee “74HC/HCT/HCU/HCMOS Logic Package Information”.
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
PIN DESCRIPTION
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
APPLICATIONS Serial data transfer
FUNCTION TABLE
Note H = HIGH voltage level = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition = LOW voltage level= LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition= lower case letters indicate the state of the referenced input one set-up time prior to the
LOW-to-HIGH clock transition= LOW-to-HIGH clock transition
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
DC CHARACTERISTICS FOR 74HCFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HCGND = 0 V; tr = tf = 6 ns; CL = 50 pF
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
DC CHARACTERISTICS FOR 74HCTFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT typesThe value of additional quiescent supply current (ΔICC) for a unit load of 1 is given in the family specifications.
To determine ΔICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCTGND = 0 V; tr = tf = 6 ns; CL = 50 pF
